msi: Introduce default_[teardown|setup]_msi_irqs with fallback. (1525bf0d) · Commits · 戴 / test

Introduce an override for the arch_[teardown|setup]_msi_irqs that can be utilized to fallback to the default arch_* code. If a platform wants to utilize the code paths defined in driver/pci/msi.c it has to define HAVE_DEFAULT_MSI_TEARDOWN_IRQS or HAVE_DEFAULT_MSI_SETUP_IRQS. Otherwise the old mechanism of over-ridding the arch_* works fine. Signed-off-by:

Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: x86@kernel.org

drivers/pci/msi.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -35,7 +35,12 @@ int arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
		#endif

		#ifndef arch_setup_msi_irqs
		int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
		# define arch_setup_msi_irqs default_setup_msi_irqs
		# define HAVE_DEFAULT_MSI_SETUP_IRQS
		#endif

		#ifdef HAVE_DEFAULT_MSI_SETUP_IRQS
		int default_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
		{
		struct msi_desc *entry;
		int ret;
		@@ -60,7 +65,12 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
		#endif

		#ifndef arch_teardown_msi_irqs
		void arch_teardown_msi_irqs(struct pci_dev *dev)
		# define arch_teardown_msi_irqs default_teardown_msi_irqs
		# define HAVE_DEFAULT_MSI_TEARDOWN_IRQS
		#endif

		#ifdef HAVE_DEFAULT_MSI_TEARDOWN_IRQS
		void default_teardown_msi_irqs(struct pci_dev *dev)
		{
		struct msi_desc *entry;

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